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Activation of Proteolysis During Oocyte In Vitro Maturation.
Mol Reprod Dev
January 2025
Liv Hospital, Centre for Regenerative Medicine and Stem Cell Manufacturing (LivMedCell), İstanbul, Turkey.
In vitro maturation (IVM) is a form of assisted reproductive technology (ART) applied to obtain mature oocytes in culture. Decline in IVM success rates by age has led consideration of novel approaches based on cellular dynamics. Our aim was to achieve proteostasis in old bovine oocytes from 13 to 16-year-old bovine with a lower potential for fertilization.
View Article and Find Full Text PDFPhysical Exercise Decreases Complement-Mediated Synaptic Loss and Protects Against Cognitive Impairment by Inhibiting Microglial Tmem9-ATP6V0D1 in Alzheimer's Disease.
Aging Cell
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Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China.
Physical exercise is known to slow synaptic neurodegeneration and cognitive aging in Alzheimer's disease (AD). The benefits of physical exercise are related to reduced amyloid beta (Aβ) deposition and increased synaptic plasticity. Yet little is known about the mechanisms that mediate these effects.
View Article and Find Full Text PDFBiochemical evidence for the diversity of LHCI proteins in PSI-LHCI from the red alga Galdieria sulphuraria NIES-3638.
Photosynth Res
January 2025
Research Institute for Interdisciplinary Science and Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan.
Red algae are photosynthetic eukaryotes whose light-harvesting complexes (LHCs) associate with photosystem I (PSI). In this study, we examined characteristics of PSI-LHCI, PSI, and LHCI isolated from the red alga Galdieria sulphuraria NIES-3638. The PSI-LHCI supercomplexes were purified using anion-exchange chromatography followed by hydrophobic-interaction chromatography, and finally by trehalose density gradient centrifugation.
View Article and Find Full Text PDFSpecificity and tunability of efflux pumps: A new role for the proton gradient?
PLoS Comput Biol
January 2025
Department of Physics, University of Toronto, Toronto, Ontario, Canada.
Efflux pumps that transport antibacterial drugs out of bacterial cells have broad specificity, commonly leading to broad spectrum resistance and limiting treatment strategies for infections. It remains unclear how efflux pumps can maintain this broad spectrum specificity to diverse drug molecules while limiting the efflux of other cytoplasmic content. We have investigated the origins of this broad specificity using theoretical models informed by the experimentally determined structural and kinetic properties of efflux pumps.
View Article and Find Full Text PDFGenetic insights into the first detection of Paracoccus marginatus (Hemiptera: Pseudococcidae) in Australia.
J Insect Sci
January 2025
Biosecurity and Animal Welfare, Department of Agriculture and Fisheries, Berrimah Farm Science Precinct, Darwin, Northern Territory 0810, Australia.
Species spread in a new environment is often associated with founders' effect, and reduced effective population size and genetic diversity. However, reduced genetic diversity does not necessarily translate to low establishment and spread potential. Paracoccus marginatus Williams and Granara de Willink is a polyphagous pest that has invaded 4 continents in around 34 years.
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